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[The Ultimate Guide] 6 Categories of Gold Detectors

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For the ease of setting up a huge array of gold detector based products, besides categorizing them based on the levels at which they perform e.g. beginner, intermediate, advanced, deep seeking and professional etc. there is one more way. This list is according to the usage requirements of the buyer whether they would prefer to have one for gold nuggets only, one for coins and relics upto the most latest type showing data in 3D outputs. Take a look at the list to determine what are the six categories of gold detectors based on their mode of utility.   

  1.  Gold Detectors For Gold Nuggets

The gold nuggets are small metallic objects which can widely vary in shape and form as well as weight but can be considered the smallest detectable objects by gold detectors. The detectors which are equipped for gold nuggets are usually smaller in size and lighter in weight, with a small coil which is able to detect minute objects underground. The depth is very low and price point is also very basic. 

  1.  Gold Detectors For Coins and Relics

The gold detectors specializing in coins and relics are comparitively more heavier and have intermediate sized coils so they can detect bigger objects easily. That is the reason why some of them ignore very small objects. The depth is not very low because the coil size is increased and they are relatively more pricier than gold detectors for nuggets. 

  1.  Gold Detectors For Deep Seeking Purposes

When the buyers require something which can only be looked into with more advanced equipment having high depth possibilities, then deep seeking purposes are conveyed and such detectors are recommended. They are very heavy and a single person cannot carry it themselves. The depth is increased and many vital functions like ground balance, digital display etc. is present. 

  1.  Multipurpose Gold Detectors 

The gold detectors which are equipped to find small to large objects under varying depths all at the same time are called multipurpose detectors. They have several options to switch to and from in different cases as well as various interchangeable hardware attachment options are also present. 

  1.  Waterproof or Underwater Gold Detectors

The detectors which are specially designed to work in extreme weather conditions like when it is raining outside or when the users would like to check the presence of gold items under the surface of water. These type of detectors come in three variation, one the most basic form is when only the coil is waterproofed. The second one is where the hole detector including the coil, shaft and control unit is made waterproof or also known as weather proof. Last is the one which can be completely immersed below the water and it will not damage the machine or its detection functionality, these are underwater gold detectors.

  1.  3D Professional Gold Detectors

The Gold detectors which are well equipped with the most precise and best quality data output generation are 3D professional gold detectors. They have either a built in backlit digital display or can be connected to external devices through third party software which then helps generate various types of data in form of very intuitive and engaging 3D graphs. 

Role of Frequency in Gold Detectors 2019

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What Frequency means in Gold detectors

Frequency means how much waves are hitting the ground emitted by the gold detector. The magnetic waves formed by a change in alternating current in the coil of the detector generates electronic waves which hit the ground and colliding with the magnetic field of another metallic object, receives the input electronic waves generating detection output.

How it is measured

It is measured in KiloHertz (KHz), which means if the frequency of your detector is, suppose a 100KHz, then 100,000 waves are hitting the ground.

Relationship of Frequency with Depth

Frequency and Depth have an inverse relationship which means if the frequency of waves hitting the ground increases, they will penetrate the ground in lesser depth. But if a lesser number of powerful waves are emitted, they will penetrate the ground comparatively deeper. 

Relationship of Frequency with Sensitivity

In contrast, frequency and sensitivity have a direct relationship, meaning if the frequency of the number of waves hitting the ground increases, it will be efficient towards detecting minor sizes of the metallic objects, increasing the sensitivity of the equipment. more And if a lesser number of waves are hitting the ground it will be more difficult to detect smaller sized object ignoring them completely or partially, resulting in less sensitivity of the equipment. 

What High Frequency means

In sum, if the gold detectors are working on high frequency of waves, they will become unable to detect objects in more depth but the sensitivity will increase as no matter how less the depth is, nothing will be ignored within that range.

What Low Frequency means

Low frequency would mean lesser number of waves hitting the ground, so they would be more powerful and go deeper into the layers of the Earth’s surface. However, it will compromise the sensitivity of the equipment as it can ignore the relatively smaller chunks of metallic objects. 

Choosing the right frequency range detectors

Depending upon your specific needs, you can choose which detectors suit you the most. Using very high frequency can cause noise in output as the equipment would become sensitive to even the metallic particles in the sand which are irrelevant in terms of their value. But using extremely low frequencies would result in ignoring valuable pieces of metal. So choosing just the right amount of frequency range by using the help of technical specialists in our firm is highly recommended to make sure you buy the right equipment. 

What Are Gold Detectors?

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Introduction

The Earth’s surface and core both are blessed with numerous resources which human beings exploit to keep the system running. These resources include precious and semi-precious metals hidden in many different forms below the Earth’s crust. One of the many challenges for people is to locate these metals and do the efforts required to dig in and extract them. Due to the technological advancements, it is now possible to determine if metal lies or not underneath the surface, without even starting to dig in. The modern equipment dramatically decreases the cost by showing probabilities of metal existence under the surface and saves much time. The equipment designed to detect specifically the gold-based metal and metallic alloys under earth’s crust is known as Gold Detectors. 

Categories of Underground Gold

The Gold which is naturally existing below Earth’s crust could be classified into two major types:

Gold Nuggets

The accumulated pieces or chunks of gold metal varying in sizes starting from the size of ballpoint pen’s tip to various ounces formed under natural circumstances by Earth core’s temperature and pressure.

Fine Gold

The gold particles in powdered or dust form mixed with other non-valuable particles from soil, which are not detected by any radiation or contact with the gold detectors. Their size is so small they are unable to affect the detection mechanism of even the powerful metal detectors.  

Basic Types of Detectors

Based on the types of outputs they provide, Gold detectors could be classified into four basic types which are:

  • Analog Gold Detectors

Detectors having an analog output where a needle deflects between two points when in contact with the threshold size of a metallic object showing relatively inaccurate reading but still signifies the presence of the object in question. These types of detectors are mostly obsolete but can be found in very beginner level equipment where precision is not the goal. 

  • Digital Gold Detectors

A rather advanced form of output where the model and build of detector assigns a number to the precious metal and non-precious metallic compounds where the readings close to the largest possible number indicate the purest metals underneath the surface whereas the numbers in lower possible ranges mean irrelevant metallic compounds.

  • Sound Based Gold Detectors

The type of detectors which make a beeping sound when metal is detected within its range and no other relevant information is provided whether the metal is in which category or its distance from the surface etc. However, the sound is louder in case of proximity and fades when the distance increases, which is vague but still effective in some situations. This technology can be seen in handheld security detectors as well as walk through gates.

  • 3D Graphics Based Gold Detectors

These gold detectors present the information in the form of colorful graphical representations where each of the colors means a specific metal or metallic compound in terms of the object’s purity. 

Huge Gold Nugget Found!

Recently, an Australian treasure hunter found a ginormous gold nugget weighing 49 ounces and grossing up to $49,000 in value! Yes, treasure hunting is a thing and gold metal detectors facilitate hunting them out from deep down the Earth. 

How Gold Detectors Work

Basically, gold detectors receive direct current from the battery, convert it into alternating current, which creates a magnetic field. This magnetic field emits electronic waves (eddy current) into the ground which when absorbed by a metallic object, create its own magnetic field. This new magnetic field distorts the earlier magnetic field and sends current to the receiving coil, which shows the output of positive metal detection.

 

Frequency of Gold Detectors

Frequency means the number of electronic waves a detector throws into the ground. Each frequency range is sensitive to a different type of compound and depending on the model and brand, these frequencies can vary. However a general rule is, that higher frequency results in decreased depth, but it becomes more sensitive and detects when smaller objects. 

Elements of Gold Detectors

  1. Coil

The circular base of the metal detector having the arrangement of wires in it in which the current flows and generates a magnetic field is called coil.

  1. Shaft

The long structure giving support to the coil and including a grip to hold the detector which makes it easier to carry and move the equipment around easily. 

  1. Control Unit

The device attached to the coil which receives input from the operator and gives output about the object is the control unit. 

Technologies in Coil

  1. DD Coil

An advanced form of the coil where the wiring within the apparatus is divided into two semicircles making a D and inverted D connected. It helps differentiate the ferrous and non-ferrous compounds within the ground which makes it easier to distinguish between gold and trash.

  1. Mono Coil

A simpler coil having wires arranged in its circumference where the circle is tightly wound covering more depth than DD coil but has the disadvantage that it does not discriminate between ferrous and non-ferrous compounds.